MANILA The Ayala-Aboitiz group has stepped up its opposition to the possibility that President Aquino will order a rebidding for the controversial Cavite-Laguna Expressway project. Team Orion, a joint venture between Ayala and Aboitiz, said it has formally petitioned Malacanang to accept the appeal of rival bidder San Miguel Corp. to declare the San Miguel bid compliant, which San Miguel said would make it the winner of the project, or to reject it, which would make Ayala the winner.